The east Londoners face Blackpool at Wembley on Saturday afternoon in one of football’s most lucrative matches, with the winner pocketing an estimated £90million in extra future income.
And Sullivan has admitted there will be a mixture of emotions after the disappointment of missing out on automatic promotion to the Premier League.
“I don’t know whether I will feel relief or elation if we go up and, if we didn’t, how upset I’d be,” Sullivan told The Times.
“I do expect to win and maybe I will be poleaxed if we don’t. As long as we are not overly complacent and don’t get any bad luck, we have between a 65 per cent to 70 per cent chance of winning.
|5/2||Blackpool are 5/2 with Paddy Power to win the play-off final on Saturday.|
“The supporters realise we have had a pretty good season and it will be very good if we go up. If we come out fast, we are a very good team.”
West Ham recorded a double over the Tangerines in the league this season, scoring eight goals in 4-0 and 4-1 victories, and Sullivan believes Blackpool’s attacking, open mentality could pave the way for the Hammers to gain victory.
“They are no pushover; it will be very exciting and high-scoring,” Sullivan added. “We have been sensational of late and if we had played like [that before], we would have won the division.
“What upset fans was [that] you anticipate winning when you play teams like Doncaster Rovers, Crystal Palace and Watford. Maybe we were too defensive at home.”